Chromium (total)
Cook Springs Water Authority
NOTE: Cook Springs Water Authority purchases water from Odenville which is required to test for chromium (total). Sample information shown below was taken by Odenville.
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | 0.500 ppb | 6 | 3 | ND - 1.000 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
NOTE: Cook Springs Water Authority purchases water from Odenville which is required to test for chromium (total). Sample information shown below was taken by Odenville.
| Date | Lab ID | Result |
|---|---|---|
| 2018-04-02 | 180400026-10 | ND |
| 2018-04-02 | 180400026-11 | ND |
| 2019-05-13 | 1905-00211-001 | ND |
| 2019-05-13 | 1905-00211-002 | 1.000 ppb |
| 2019-05-13 | 1905-00211-003 | 1.000 ppb |
| 2019-05-13 | 1905-00211-006 | ND |
| 2019-05-13 | 1905-00211-009 | 1.000 ppb |
| 2019-05-13 | 1905-00211-010 | ND |
| 2021-05-10 | 2105-00143-009 | ND |
| 2021-05-10 | 2105-00143-013 | ND |
| 2022-04-05 | 2204-00058-001 | ND |
| 2022-04-05 | 2204-00058-002 | ND |
| 2022-04-05 | 2204-00058-003 | ND |
| 2022-04-05 | 2204-00058-004 | ND |
| 2022-04-05 | 2204-00058-005 | ND |
| 2022-04-05 | 2204-00058-006 | ND |